Isotope dilution gas chromatographic-mass spectrometric method for the determination of lignans and isoflavonoids in human urine, including identification of genistein

1991 ◽  
Vol 199 (3) ◽  
pp. 263-278 ◽  
Author(s):  
Herman Adlercreutz ◽  
Theodore Fotsis ◽  
Christoph Bannwart ◽  
Kristiina Wähälä ◽  
Gösta Brunow ◽  
...  
Keyword(s):  
Isotope Dilution ◽  
Human Urine ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Chromatographic Mass

Isotope Dilution Gas Chromatographic–Mass Spectrometric Method for the Determination of Isoflavonoids, Coumestrol, and Lignans in Food Samples

1996 ◽  
Vol 233 (2) ◽  
pp. 169-180 ◽  
Author(s):  
Witold Mazur ◽  
Theodore Fotsis ◽  
Kristina Wähälä ◽  
Sirpa Ojala ◽  
Auli Salakka ◽  
...  
Keyword(s):  
Isotope Dilution ◽  
Food Samples ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Chromatographic Mass

Gas-chromatographic/mass-spectrometric determination of theophylline in whole blood.

1977 ◽  
Vol 23 (1) ◽  
pp. 64-68 ◽  
Author(s):  
M Sheehan ◽  
R H Hertel ◽  
C T Kelly
Keyword(s):  
Coefficient Of Variation ◽  
Whole Blood ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Mass Spectrometric Determination ◽  
Pediatric Populations ◽  
Chromatographic Mass

Abstract We describe a combined gas-chromatographic mass-spectrometric method for determination of theophylline in whole blood. With use of a probability-based matching approach, the extensive gas-chromatographic interference did not affect mass-spectrometric quantitation of theophylline. Concentrations expected and found were linearly related from 1 to 60 mg/liter; the run-to-run coefficient of variation was less than 8%, within-run less than 6%. Some other xan-thines and drugs frequently co-administered with theophylline did not affect results. Only 0.2 ml of blood is required, which makes the procedure useful for monitoring theophylline in newborns and pediatric populations.

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